It is a multistage air particulate sampling system Moudi II (120R) with rotating impact plates. The system operates at a rate of 30 l / min and select particulate, according to aerodynamic diameter particles, in 10 stages plus the absolute filter final. The stages have a cut size (in microns) to 0.056, 0.10, 00:18, 12:32, 0.56, 1.0, 1.8, 3.2, 5.6, 10 and 18. Pressure sensors control the stability of the flow in the micro holes and there is a remote control system of sampling by remote connection.